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Taiwan Semiconductor Corporation SMB10J12CAH
- Part No.:
- SMB10J12CAH
- Manufacturer:
- Taiwan Semiconductor Corporation
- Category:
- TVS Diodes
- Package:
- DO-214AA, SMB
- Datasheet:
-
SMB10J12CAH.pdf
- Description:
- TVS DIODE 12VWM 19.9VC DO214AA
- Quantity:
- Payment:
- Shipping:
Inventory:8,436
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Product details
Overview
SMB10J12CAH from Taiwan Semiconductor is a bidirectional 12V standoff transient voltage suppressor (TVS) diode in DO-214AA (SMB) package, rated for 1000W peak pulse power, 19.9V clamping voltage at 50.3A peak pulse current, and AEC-Q101 qualified for automotive electronics protection against ISO 7637-2 transients.
For engineers reviewing the SMB10J12CAH datasheet, SMB10J12CAH pinout, SMB10J12CAH application, or SMB10J12CAH equivalent, key selection criteria include bidirectional clamping capability, 12V working voltage with ±10% tolerance, 175°C junction temperature rating, and compliance with automotive ESD and electrical fast transient immunity standards.
Technical Context
The SMB10J12CAH is a glass-passivated, single-die bidirectional TVS diode designed for high-energy transient suppression in automotive and industrial power rails. It delivers sub-1ps response time and meets ISO 7637-2 Pulse 1/2a/2b/3a/3b test requirements without external circuitry.
Its thermal design supports 20°C/W junction-to-lead resistance and operates across –55°C to +175°C ambient range. The device uses a symmetrical avalanche structure enabling equal clamping in both polarities, with 5µA max reverse leakage at 12V standoff.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VWM | 12 V - Maximum continuous reverse operating voltage before clamping initiates |
| VBR (min/max) | 13.3 V / 14.7 V - Breakdown voltage range at 1 mA test current; defines turn-on threshold consistency |
| VC @ IPPM | 19.9 V - Clamping voltage at 50.3 A peak pulse current; limits downstream voltage stress during transients |
| PPK | 1000 W - Peak pulse power handling per 1 ms waveform; enables robust surge immunity per ISO 7637-2 |
| TJ max | +175 °C - Maximum junction temperature; supports under-hood automotive placement without derating |
| Package | DO-214AA (SMB) - Surface-mount package with 0.110 g mass and J-STD-002 solderable matte tin leads |
Pinout & Package
DO-214AA (SMB) package: cathode band marking indicates polarity; bidirectional operation means no functional anode/cathode distinction-both terminals are symmetrically rated for reverse conduction.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| Anode (marked side) | Transient return path (bidirectional) | Provides low-impedance path to ground or rail during positive or negative voltage excursions |
| Cathode (band side) | Transient return path (bidirectional) | Identical conduction behavior to anode terminal; marking denotes physical orientation only, not functional polarity |
Key Features
| Feature | Design Value |
|---|---|
| AEC-Q101 qualification | Validated for automotive-grade reliability including temperature cycling, HTRB, and ESD testing per JEDEC standards |
| Glass-passivated junction | Enhances long-term stability and moisture resistance versus epoxy-passivated alternatives |
| ISO 7637-2 compliance | Guarantees suppression of standardized automotive load-dump and inductive-switching transients without additional filtering |
| Level 1 moisture sensitivity | Enables standard SMT reflow without baking; compatible with automated high-volume assembly |
| Halogen-free construction | Meets IEC 61249-2-21 for environmentally compliant PCB manufacturing and end-of-life processing |
Applications
| Automotive Lighting Systems | Engine Control Unit (ECU) Power Rails |
|---|---|
Use Scenario: Protecting LED driver ICs from load-dump transients during vehicle battery disconnect/reconnect events. IC Role / Device Role / Timing Role: Bidirectional clamping element placed across 12V supply input to limit voltage excursion to ≤19.9V. Use Value: Prevents latch-up or permanent damage to sensitive buck controllers and gate drivers during ISO 7637-2 Pulse 5a events. | Use Scenario: Safeguarding microcontroller power inputs against inductive switching spikes from fuel injectors or solenoids. IC Role / Device Role / Timing Role: Low-leakage (≤5 µA @ 12V) transient shunt connected between VDD and GND near MCU decoupling capacitors. Use Value: Maintains system reset integrity by clamping spikes within 1 ps, avoiding false resets or memory corruption. |
| Industrial Motor Drives | Commercial HVAC Control Boards |
Use Scenario: Suppressing back-EMF transients generated by brushed DC motor commutation in factory automation systems. IC Role / Device Role / Timing Role: Parallel-connected TVS on H-bridge supply rail to clamp bidirectional flyback energy. Use Value: Enables use of cost-effective MOSFETs by limiting voltage overshoot to 19.9V, reducing need for higher-VDS devices. | Use Scenario: Protecting communication interfaces (e.g., RS-485 transceivers) from EFT bursts induced by relay switching in duct-mounted controllers. IC Role / Device Role / Timing Role: Input-side TVS on 24V auxiliary rail feeding isolated data lines. Use Value: Meets IEC 61000-4-4 Level 4 immunity (4 kV) without adding RC filters that degrade signal rise time. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar transient voltage suppression applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| Littelfuse SMAJ12CA | Same DO-214AC (SMA) package; 12V VWM, 19.9V VC @ 50.3A, but lower PPK (400W) and non-AEC-Q101 rated | Not qualified for automotive under-hood use; suitable for commercial-grade industrial controls | Select when AEC-Q101 is not required and board space allows SMA footprint |
| Vishay SMF12CA | DO-219AB (SOD-123FL) package; 12V VWM, 21.2V VC @ 47.2A, 600W PPK, AEC-Q101 qualified | Smaller footprint and lower clamping margin; limited thermal mass reduces surge endurance in repetitive events | Prefer for space-constrained designs where 600W peak rating suffices and lead-free reflow compatibility is critical |
Compared with SMB10J12CAH, SMAJ12CA offers smaller size but sacrifices 60% peak power and automotive qualification, while SMF12CA retains AEC-Q101 compliance in a miniature package yet trades 40% clamping performance and thermal robustness for board area savings.
Availability
SMB10J12CAH is available at Aetrix Electronics and suitable for automotive lighting systems, engine control units, industrial motor drives, and commercial HVAC control boards requiring stable component supply and full AEC-Q101 traceability.
Supply support for SMB10J12CAH includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Taiwan Semiconductor Corporation (TSC) is a vertically integrated analog and discrete semiconductor manufacturer headquartered in Hsinchu, Taiwan, specializing in TVS diodes, rectifiers, and power MOSFETs for automotive and industrial markets.
The SMB10JxxCAH series was developed specifically to meet stringent ISO 7637-2 and AEC-Q101 requirements for bidirectional transient protection in 12V/24V automotive subsystems, emphasizing reliability under thermal and mechanical stress.
FAQ
What is the clamping voltage of SMB10J12CAH at its rated peak pulse current?
The SMB10J12CAH has a maximum clamping voltage (VC) of 19.9 V at 50.3 A peak pulse current (IPPM), measured under the 10/1000 µs waveform per IEC 61000-4-5. This value ensures downstream components see no more than 19.9 V during worst-case transients, directly supporting 24V system IC survivability.
Is SMB10J12CAH suitable for automotive applications requiring AEC-Q101 qualification?
Yes, SMB10J12CAH is explicitly AEC-Q101 qualified per the manufacturer's datasheet revision A2102. It undergoes stress testing including temperature cycling, high-temperature reverse bias, and ESD per JESD22, making it approved for under-hood and chassis-mounted automotive modules.
How does the bidirectional configuration of SMB10J12CAH affect its circuit implementation?
The 'CAH' suffix denotes bidirectional operation, meaning SMB10J12CAH clamps equally for positive and negative transients without polarity sensitivity. No orientation-dependent placement is needed-either terminal connects to the protected line, the other to reference-simplifying layout and eliminating risk of reverse installation.
What is the maximum steady-state power dissipation rating for SMB10J12CAH?
SMB10J12CAH has a steady-state power dissipation (PD) rating of 5 W at TA = 25°C, derated linearly above that temperature per the datasheet's Fig. 2. This rating applies only to continuous DC or low-frequency leakage conditions-not transient events-and must be verified against actual board-level thermal resistance.
Does SMB10J12CAH meet RoHS and halogen-free requirements?
Yes, SMB10J12CAH is RoHS compliant and halogen-free per IEC 61249-2-21, using molding compound and plating materials that exclude brominated flame retardants and chlorine-based additives-ensuring compliance with EU environmental directives and modern green manufacturing standards.
SMB10J12CAH Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Taiwan Semiconductor Corporation
- Package/Case:
- DO-214AA, SMB
- Series:
- SMB10J
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Zener
- Unidirectional Channels:
- -
- Bidirectional Channels:
- 1
- Voltage - Reverse Standoff (Typ):
- 12V
- Voltage - Breakdown (Min):
- 13.3V
- Voltage - Clamping (Max) @ Ipp:
- 19.9V
- Current - Peak Pulse (10/1000µs):
- 50.3A
- Power - Peak Pulse:
- 1000W (1kW)
- Power Line Protection:
- No
- Applications:
- -
- Capacitance @ Frequency:
- -
- Operating Temperature:
- -55°C ~ 175°C (TJ)
- Grade:
- Automotive
- Qualification:
- AEC-Q101
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- DO-214AA (SMB)
SMB10J12CAH FAQ
1.How can I place an order for SMB10J12CAH through Aetrix?
Please submit a Request for Quotation (RFQ) for SMB10J12CAH on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for SMB10J12CAH reliable?
The price and inventory of SMB10J12CAH are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SMB10J12CAH is usually 5 days.
3.What payment methods are accepted for SMB10J12CAH?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SMB10J12CAH transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SMB10J12CAH?
SMB10J12CAH orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SMB10J12CAH order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for SMB10J12CAH?
For technical support, including SMB10J12CAH datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SMB10J12CAH requirements.
6.How does Aetrix verify that SMB10J12CAH is sourced from the original manufacturer or authorized distributors?
All SMB10J12CAH products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that SMB10J12CAH meets industry standards.
7.What is the process for return or replacement of SMB10J12CAH?
All SMB10J12CAH units undergo pre-shipment inspection (PSI). If there is an issue with SMB10J12CAH, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The SMB10J12CAH part is unused and in its original packaging.
Return procedure for SMB10J12CAH:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SMB10J12CAH Tags
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